sample1.arff

@relation sample1

@attribute f1 {f1_a,f1_b,f1_c,f1_d}
@attribute f2 {f2_a, f2_b, f2_c}
@attribute f3 {f3_a, f3_b}
@attribute class {true,false}

@data

f1_a,f2_a,f3_a,true
f1_a,f2_b,f3_b,true
f1_a,f2_c,f3_a,true 
f1_a,f2_a,f3_b,true
f1_b,f2_a,f3_a,false
f1_b,f2_b,f3_b,false
f1_c,f2_c,f3_a,false
f1_d,f2_a,f3_b,false